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Overview

Cortana, the world’s first truly personal digital assistant, is available soon on Windows Phone 8.1. Powered by Bing, Cortana is driven by state-of-the-art algorithms using natural language, machine learning, and contextual signals that benefit from advances incubated at Microsoft Research. This approach uses the massive clickstream-feedback loop of web search, along with additional semantics and data. This approach enables Cortana to grow in breadth of domains that cover the web: from the more common “head” queries and conversations to the less frequent “tail”—all at a personal level, empowering Cortana to provide robust personal assistance that becomes even more advanced over time.